Reducing the fuel consumption and the pollutant emissions becomes more and more demanding, hence, in recent years, hybridization started to play an important part in the automotive industry. While both hybrid and pure electric vehicles represent viable solutions for modern vehicle applications, hybrid electric vehicles (HEV) removes the dis-advantage of using a single source of energy. The aim of this paper is to investigate the energetic performance of a parallel HEV in different test cycles, such as Worldwide Harmonized Light Vehicles Test Cycle (WLTC), considering multiple levels of hybridization. The study is done using complex models developed in a performant simulation environment. The energetic performances are being compared in different cycles by analyzing the FCR (fuel consumption ratio) using three different values for the hybridization factor (HF). A comparison of the test cycles is being realized using FCR parameter, also an analysis of the correlation between FCR and VSF (vehicle speed fluctuation) is done. The simulation results obtained for the current application are compared with the ones obtained for a conventional vehicle as well as considering an electric vehicle.

Nd-Fe-B-type magnet is exclusively used as a rotor magnet in the traction motor of hybrid electric vehicle (HEV) and electric vehicle (EV), but its overly high operating temperature is a lingering problem attached to the magnet. The major cause of the high operating temperature is eddy current, which is readily generated in the highly conductive metallic magnet under alternating magnetic field from stator ripple. In this article, temperature rise in the Nd-Fe-B-type magnet with varying electrical resistivity under alternating magnetic field is discussed with the intention of highlighting the importance of enhancing the electrical resistivity for reducing the operating temperature of the Nd-Fe-B-type rotor magnet. Temperature rise in the Nd-Fe-B-type magnet (dielectric salt-added die-upset magnet) with high electrical resistivity is noticeably lower compared to the magnet (commercial sintered rotor magnet) with lower electrical resistivity, substantiating the theory that enhancing the electrical resistivity in the rotor magnet is fairly effective for suppressing the over-rise of its operating temperature during operation. Die-upset process is revealed to be particularly pertinent for the fabrication of highly dense salt-added magnet with high electrical resistivity. Graphic abstract